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Tinting ?

when tinting a dark gradient lens on a gradient machine, is there a way to avoid the semi circular effect at the bottom of the lenses? As it is I'm bleaching out the bottoms (sometimes unsuccessfully) Very annoying

We use a small amount of dish soap in the rinse water to break the surface tension. Also consider setting gradient 3/4 with the last dip slightly submersing the entire lens to remove any bubbles formed on lens holder.

when tinting a dark gradient lens on a gradient machine, is there a way to avoid the semi circular effect at the bottom of the lenses? As it is I'm bleaching out the bottoms (sometimes unsuccessfully) Very annoying

Try to tint the lens on your gradient arm, instead of removing the dye. Slower process that way but better results.